postgresql - Getting "Access is denied" error when executing pg_dump on Windows -

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i'm trying execute pg_dump 1 of postgresql databases, having permission problems.

c:\windows\system32>pg_dump -u postgres -p 1863 -o social_sense > c:\\program files\\postgresql\\8.4\\data\\social_sense.sql


getting following error:

access denied


can enlighten?

i apologise taking time. due there no write permission directory writing to.


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